Car-bolster.



P-ATENTED SEPT. l2, 1.905.

No.l 799,330.

J. GREEN. UAR BOLSTER.. APFLIGATION FILED JAN. 29l 1904.

Fig. 4.

Attorneys.

UNITED ETATS PATENT OFFICE.

JOHN GREEN, OF ST. LOUIS, MISSOURI, ASSIGNOR TO IN H. BENNERS,

OF ELIZABETH, NEW JERSEY. 4

CAR-BOLSTER.

Specification of Letters Patent.

Patented Sept. 12, 1905.

Application led January 29, 1904. Serial No. 191,125.

To all whom it may concern:

Be itlmown that I, JOHN GREEN, a citizen of the United States, and aresident of the city of Louis and State of Missouri, have invented a newand useful improvement in Car-Bolsters, of which the following is aspecification.

My invention relates to car-holsters, either truck-holsters orbody-holsters; and its prin-l cipal objects are to cheapen the cost ofmanuoi' holsters of given strength, to provide a bolster that may bemade of cast-steel with a greater economy in pattern material and coremateriai, to provide a bolster of such construction that the patternwill be easy to draw from the mold and may be drawn without danger ofinjuring the mold, to provide a bolster that may be usedwithtransom-trucks,

A with a resulting economy of both material and 2o space, andotherobjects hereinafter more fully appearing.

My invention consists in the parts and in the arrangements andcombinations of parts hereinafter described and claimed.

In the accompanying drawings, forming a part of this specification,andwherein like symbols refer to like parts wherever they occur, Figure lis a fragmentary sectional view through atruck and car, showing myimproved bolster applied both as a truck-bolster and body-bolster. Fig.2 is a section on the line 2 2 of Fig. 1, omitting the details of thetruck. 3 is a section ou the line 3 3 of Fig, 1. Fig. 4 is a sectionsimilar to that of Fig. 2, showing the bolster as used with atransomtruck; and Fig. 5 is a plan view of a truckbolster. f

My improved bolster consists of a wide and comparatively thin top'member 1, a narrow and comparatively thick bottom member 2, andsubstantially egcs-shaped members 3 4f, which are externally convex attheir upper portions and externally concave at their lower portions, thecurves mergingeither with each other or with a substantially straightportion connecting them. Thesemembers have this form throughout thelength of the bolster, being modified in proportion only from the wideand deep central portion to the narrower and shaliower end portions. Thebolster thushas asubstantiallytriangular section. In the case of atruck-bolster the section at the extreme ends is substantiallyrectangular in order to provide the necessary column-guides 5 6, whichare of facture of car-holsters, to reduce the weightA the usual form.The top member of the truckbolster is provided with the usual centerplate 7 and side bearings 8 9. From the center of the center plate 7 aking-pin post 10 extends from the top member 1 down to the bottom member2. The king-pin post has an outer diameter equal to or greater than thewidth ofthe bottom member. By this construction the king-pin post servesas a strut to transmit the load to the bottommember and distribute itover the entire width of the latter. The bottom member'of thebody-bolster is provided with the usual side bearings 11 12 and centerbearing 13. At the center it is provided with a kingpin post 14,extending from the top member 1 to the bottom member 2. vThe king-pinpost thus serves 'as a strut in .the body-bolster as well as in' thetruck-bolster. As the bolster is an integral cast-steel article, the topmembers and the side members have a plurality of holes 15 produced bythe core supporting members of the mold and through which the core maybe removed from the casting.

In combination with the cross-tie trucks, as

illustrated in'Figs. 1 to 3,k the truck-bolster extends below thecross-ties 16 17. The bol- ,ster being narrow at the bottom, it mayextend between the cross-ties, and thus may be made deeper withoutraising the center plate. As the metal is more efficient in resistingiiexure the farther from the axis it is placed, it follows that lessmetal is required vto produce a bolster of given strength. The sameadvantage obtains inthe use of the truckbolster in transom-trucks, asillustrated in Fig. 4. The body-bolster also has peculiar advantageswhen used with transom-trucks. Because of the narrow bottom member thereis suncient room for the lateral movement of the body-bolster betweenthe transoms 18 19. Hence it is unnecessary to raise the center plateand side bearings of the truck-bolster above the transoms, and thereforethe carbody may lower, space being saved vertically. Car-holsters aresubjected to horizontal as well as vertical forces, and they are insubstantially the plane of the top member. The holsters illustrated haveimproved eiiiciency in taking ca re of the horizontal strain, for theside members, externally convex at their upper portion, provide metal atthe point where it is most ciiicient for this purpose. l

As the bolster converges fromthe top member to the bottom member,it'necessarily follows that the pattern thereof will draw easily fromthe mold and the vdanger of injuring the mold'in drawing the pattern islessened.

;Obvi o'usly my improved bolster Vadmits of considerable modilicationwithin the scope of my invention, and therefore I do-not wish to belimited to the specific construction shown and described.

What I claim` as my invention, and desire to secure by Letters Patent,is

1. An integral car-bolster comprising a top member, a bottom member,and' side members connecting the top and bottom members to form asubstantially triangular cross-section.

2. An integral car-bolster comprising a wide top member, a narrow bottommember, and

side members converging from the sides of said topme b er down to saidbottom member.

3. A car-b lstbr comprising. a top member, a bottom member, and sidemembers connecting said top and bottommembers, said side members beingexternally convex at their upper portions and externally concave attheir lower portions. r

4. A car-bolster comprising a top member,

a bottom member, and substantially ogeeshaped'side members connectingsaid top and bottom members.I

5. A car-bolster comprising a top member,

a bottom member, downwardly-convergjngV side members connecting said topand bottom members, and a king-pin post extending from said top memberto said bottom member and arranged to distribute load over the entirewidth of said bottommember.

6. A car-bolster comprising awide top member and side members connectedto the sides of said top members and downwardly converging to form asubstantially triangular crossl section. A A

7 The combination of a oar-truck, 'having separated cross-ties, and abolster having a wide top member, a narrow bottom member anddownwardly-converging side members connecting said top and bottommembers, 'said bolster being narrow enough at its lower edge to enterbetween said cross-ties.

8. The combination of a car-truck, transoms therein, a truck-bolster ofsubstantially triangular cross-section the middle lower portions of saidbolster extending between and 10. In a bolster, the combination withI atopl plate at throughout the greater portion of its length, a bottomplate inclining or curving upward from its center toward the ends of thetop plate, and inclined webs connecting l side edges of the top andbottom plates.

11. A bolster of one integral casting, comprising a top plate, a bottomplate, inclined side webs connecting them, enlarged ribbed ends on thebolster having recesses in their sides, integral center and end bearingson the top plate, and a hollow post in the center of center bearing anddepending therefrom.

In testimony whereof I have signed my name4 l to this speciication inthe presence of two subscribing witnesses TJOHN -GREEN. Witnessesr. T.W. Remi/inns, FRED F.. RnIsN'ER.

